<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,user-scalable=no, initial-scale=1.0"/>
    <meta http-equiv="X-UA-Compatible" content="ie=edge"/>
    <title>jQuery下拉菜单</title>
    <link rel="stylesheet" href="dem.css">
    <script src="../../../jquery-js/jquery.js"></script>
    <script src="dem.js"></script>
</head>
<body>
<div class="dropdown_warp">
    <ul>
        <li>
            <a href="javascript:void (0);">一级菜单</a>
            <ul class="ul_content">
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
            </ul>
        </li>
        <li>
            <a href="javascript:void (0);">一级菜单</a>
            <ul class="ul_content">
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
            </ul>
        </li>
        <li>
            <a href="javascript:void (0);">一级菜单</a>
            <ul class="ul_content">
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
            </ul>
        </li>
        <li>
            <a href="javascript:void (0);">一级菜单</a>
            <ul class="ul_content">
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
            </ul>
        </li>
        <li>
            <a href="javascript:void (0);">一级菜单</a>
            <ul class="ul_content">
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
                <li><a href="javascript:void(0);">二级菜单</a></li>
            </ul>
        </li>
    </ul>
</div>
</body>
</html>